A wiring harness virtual connection short circuit detection method, intelligent power distribution system and vehicle

Abstract

The application discloses a kind of wire harness virtual connection short circuit detection method, intelligent power distribution system and vehicle, including obtaining vehicle state information and identifying vehicle power-off scene;In the vehicle power-off scene, the real-time current value of each power distribution channel is obtained;The real-time current value is compared with the preset standby power consumption reference value;When the absolute value of the difference between the real-time current value and the standby power consumption reference value exceeds the preset threshold value, it is determined that the wire harness virtual connection short circuit anomaly is short-circuited, the power supply loop of abnormal power distribution channel is cut off, and alarm information is sent.The application solves the technical problems that the conventional fuse box cannot effectively protect in the wire harness virtual connection short circuit scene in the prior art.

Description

Technical Field

[0001] This invention relates to the field of intelligent power distribution technology for automotive low-voltage systems, and in particular to a method for detecting loose connections and short circuits in wiring harnesses, an intelligent power distribution system, and a vehicle. Background Technology

[0002] The power supply and distribution system of an electric vehicle typically consists of a battery, a fuse box, and then electrical appliances. Currently, the most common power supply protection method is to use a traditional fuse box. A traditional fuse box uses a fuse as a hardware protection element. When the circuit current exceeds the rated threshold of the fuse, the fuse melts to cut off the circuit.

[0003] However, existing technologies have shortcomings: traditional fuse boxes only have hardware protection functions and lack software protection mechanisms, making them unable to achieve scene pattern recognition and vehicle communication; furthermore, in the event of a loose connection or short circuit in the wiring harness, intermittent electrical sparks may occur at the loose connection point, but the circuit current often does not reach the fuse's melting threshold, causing the fuse to fail to trip and providing protection. The system also cannot perceive the vehicle's current status and assumes it is operating normally. If ignition continues, it can easily ignite surrounding flammable materials in a high-temperature environment, leading to a serious vehicle fire and safety hazard. Summary of the Invention

[0004] To address the aforementioned issues, this invention proposes a method for detecting wire harness short circuits with loose connections, an intelligent power distribution system, and a vehicle, thereby resolving the technical problem that traditional fuse boxes cannot effectively protect against wire harness short circuits with loose connections in existing technologies.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: In a first aspect, the present invention provides a method for detecting short circuits in wire harness connections, comprising the following steps: Acquire vehicle status information and identify vehicle power-off scenarios; In the scenario where the entire vehicle is powered off, obtain the real-time current value of each power distribution channel; The real-time current value is compared with a preset standby power consumption reference value; When the absolute value of the difference between the real-time current value and the standby power consumption reference value exceeds a preset threshold, it is determined to be an abnormal short circuit in the wiring harness, the power supply circuit of the abnormal power distribution channel is cut off, and an alarm message is sent.

[0006] In a further technical solution, the real-time current value of each power distribution channel is obtained as the current value of the constant power supply channel, and the constant power supply channel is the EFUSE channel.

[0007] A further technical solution involves obtaining vehicle status information by receiving a power-down status signal sent by the vehicle control unit and identifying the vehicle power-down scenario based on the power-down status signal.

[0008] A further technical solution includes, before determining that the wiring harness is loosely connected or short-circuited, making an anomaly judgment based on the power consumption characteristics corresponding to the current power consumption scenario mode.

[0009] A further technical solution is that the power consumption scenario mode includes at least one of the following: normal power-on / off mode, remote power-on / off mode, OTA power-on mode, slow charging power-on mode, fast charging power-on mode, or thermal runaway power-on mode.

[0010] Secondly, the present invention provides an intelligent power distribution system, based on a method for detecting loose connections and short circuits in a wiring harness as described in any one of the first aspects, comprising: High-voltage to low-voltage converter, battery, intelligent power distribution unit, vehicle domain control unit, and cockpit domain control unit; The high-voltage to low-voltage converter is used to convert high-voltage electricity into low-voltage electricity; the battery is connected in parallel with the high-voltage to low-voltage converter and then electrically connected to the intelligent power distribution unit; the intelligent power distribution unit includes a control module, a current detection module and multiple power distribution channels, each power distribution channel is equipped with a current sensor, the control module is electrically connected to the current detection module, and the intelligent power distribution unit is communicatively connected to the vehicle domain control unit and the cockpit domain control unit respectively.

[0011] In a further technical solution, the current sensor is used to acquire the real-time current value of each power distribution channel.

[0012] Thirdly, the present invention provides a vehicle including a memory and a processor, and computer instructions stored in the memory and running on the processor, wherein the computer instructions, when executed by the processor, perform a wiring harness short circuit detection method as described in any one of the first aspects.

[0013] Fourthly, the present invention provides a computer-readable storage medium for storing computer instructions, which, when executed by a processor, perform a wire harness short-circuit detection method as described in any one of the first aspects.

[0014] Fifthly, the present invention provides a computer program product comprising executable instructions stored in a computer-readable storage medium; wherein, when a vehicle's processor reads and executes the executable instructions from the computer-readable storage medium, it completes the wiring harness short-circuit detection method described in any one of the first aspects.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention monitors the current values ​​of each power distribution channel in real time when the vehicle is powered off and compares them with preset standby power consumption benchmarks. This allows for the timely detection of abnormal currents caused by loose connections or short circuits in the wiring harness. It overcomes the limitation of traditional fuse boxes, which cannot protect against short circuits before the current reaches the fusing threshold. This invention enables early identification and circuit disconnection of abnormal currents, effectively preventing serious situations such as engine stalling and vehicle fires caused by loose connections or short circuits to the vehicle body. Furthermore, by combining power consumption scenario modes for comprehensive anomaly judgment, this invention sets corresponding judgment strategies for power consumption characteristics under different scenarios and adds duration-based judgment conditions to filter instantaneous current fluctuations. This significantly improves the accuracy and reliability of detection, avoids power outages caused by false alarms, and ensures the timely detection of genuine anomalies. Attached Figure Description

[0016] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0017] Figure 1 This is a flowchart of a wire harness short-circuit detection method according to the present invention; Figure 2 This is a structural diagram of an intelligent power distribution system according to the present invention. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] It should be noted that the following detailed descriptions are exemplary and intended to provide further illustration of the invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0020] Where there is no conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0021] Terminology Explanation: IDU (Intelligent Distribution Unit): An intelligent power distribution unit is an intelligent power distribution device that integrates electronic components. It contains a control module, a current detection module, and multiple power distribution channels. It can realize current visualization monitoring, fault diagnosis, and communication with the vehicle control unit, replacing the traditional fuse box to achieve more intelligent power supply protection.

[0022] EFUSE: Electronic fuse is a programmable electronic protection component used in constant power supply channels. It has programmable overcurrent protection function and has advantages over traditional fuses such as resettableness, programmability, and fast response speed.

[0023] HSD (High Side Driver): A high-side driver is a controlled power supply element used in controlled power supply channels. Its on / off state is controlled by the vehicle control signal, and theoretically, it has no current output when the vehicle is powered off.

[0024] DCDC: High Voltage to Low Voltage Converter, is a power conversion device that converts high voltage batteries (such as 800V) into 12V low voltage to supply power to low voltage electrical appliances when the vehicle is powered on.

[0025] Standby power consumption benchmark value: refers to the rated standby current value of each electrical appliance in the vehicle under a specific power consumption scenario. This data is pre-stored in the storage module of the IDU and serves as a benchmark reference value for judging abnormal current.

[0026] Loose wiring harness connection: This refers to the abnormal phenomenon where poor contact at the wiring harness connection point leads to increased contact resistance, resulting in intermittent electric sparks when energized. The current during a loose connection short circuit is often lower than the melting threshold of a traditional fuse, but continuous sparking can generate high temperatures, posing a safety hazard of igniting surrounding combustibles and causing a vehicle fire.

[0027] Example 1 In the existing technology, the power supply and distribution system of electric vehicles usually uses traditional fuse boxes for circuit protection. Traditional fuse boxes use fuses as hardware protection components. When the circuit current exceeds the rated threshold of the fuse, the fuse melts to cut off the circuit.

[0028] However, in the case of a loose connection or short circuit in the wiring harness, intermittent electric sparks will be generated at the loose connection point. However, at this time, the circuit current often does not reach the fuse's melting threshold, causing the fuse to fail to activate and provide protection. Furthermore, traditional fuse boxes cannot sense the current status of the vehicle and assume that it is working normally. If the engine continues to be ignited, it is very easy to ignite surrounding combustibles in a high-temperature environment, causing a serious safety accident such as a vehicle fire.

[0029] To address the aforementioned issues, this embodiment provides a method for detecting loose short circuits in wiring harnesses. The core of this method is as follows: In a vehicle power-off scenario, the IDU continuously monitors real-time current values ​​using current sensors built into each power distribution channel. The detected real-time current value is compared with a pre-stored standby power consumption benchmark value. A comprehensive judgment is made based on the current power consumption scenario. When the difference between the detected real-time current value and the benchmark value exceeds a preset threshold, a loose short circuit in the wiring harness is identified. The power supply circuit of the abnormal power distribution channel is immediately cut off, and the abnormal information is reported to the cockpit domain control unit via the communication bus. An alarm is displayed on the instrument panel to prompt the user to troubleshoot the fault. This allows for the identification of abnormalities and the execution of protective actions before the current reaches the traditional fuse blowing threshold, achieving a proactive protection strategy combining hardware and software. This effectively prevents fires and vehicle ignition accidents caused by loose short circuits in the wiring harness.

[0030] like Figure 1As shown, the specific steps in this embodiment are as follows: S1: Obtain vehicle status information and identify vehicle power-off scenarios.

[0031] In step S1, after the vehicle main controller completes the power-down operation, the vehicle domain control unit (VIU) detects the vehicle power-down signal and sends the power-down status information to the intelligent power distribution unit (IDU) through the vehicle communication bus (such as the CAN bus).

[0032] After receiving the power-down status information, the control module of the Intelligent Power Distribution Unit (IDU) identifies that the current state is a vehicle power-down scenario. A vehicle power-down scenario refers to the state where the vehicle main controller completes the power-down operation and the high-side drive HSD channel stops outputting. At this time, the EFUSE constant power channel still maintains power supply to maintain the standby power consumption of some modules.

[0033] By transmitting the power-down status signal from the vehicle domain control unit (VIU), the intelligent power distribution unit (IDU) can accurately identify when the vehicle enters a power-down scenario, thereby activating a wiring harness short circuit detection strategy for that scenario. This avoids false detections during normal power-on operation and improves the targeting of the detection.

[0034] S2: In the scenario where the entire vehicle is powered off, obtain the real-time current value of each power distribution channel.

[0035] In step S2, each power distribution channel of the intelligent power distribution unit (IDU) is equipped with a current sensor. In this embodiment, the current sensor can be a Hall current sensor, a shunt resistor sampling circuit, or other types of current detection devices.

[0036] When the vehicle is powered off, the control module of the Intelligent Power Distribution Unit (IDU) activates its current detection function, focusing on monitoring the real-time current value of the EFUSE channel, which is constantly powered. Theoretically, the high-side drive HSD channel should have no current output when the vehicle is powered off; therefore, the EFUSE channel is the primary focus of monitoring.

[0037] By acquiring the current data of each EFUSE channel in real time through the built-in current sensors of each channel, an accurate data basis is provided for subsequent anomaly judgment. Compared with traditional fuse boxes that cannot acquire current data, this embodiment realizes the visualization monitoring of current.

[0038] S3: Compare the real-time current value with the preset standby power consumption reference value; In step S3, the storage module of the intelligent power distribution unit (IDU) pre-stores standby power consumption baseline data for each electrical component of the vehicle under different power consumption scenarios. In this embodiment, the power consumption scenarios include at least one of the following: normal power-on / off mode, remote power-on / off mode, OTA power-on mode, slow charging power-on mode, fast charging power-on mode, or thermal runaway power-on mode.

[0039] The control module of the Intelligent Power Distribution Unit (IDU) retrieves the standby power consumption reference value for each EFUSE channel under the corresponding scenario from a table in the storage module based on the current power consumption scenario mode information transmitted by the Vehicle Domain Controller (VIU). The control module compares the real-time current value of each channel detected in step S2 with the corresponding standby power consumption reference value and calculates the absolute value of the difference.

[0040] For example, if an EFUSE channel is connected to a battery management unit (BMS), under normal power-down conditions, the BMS's standby power consumption baseline is 50mA. If the detected real-time current value is 55mA, then the absolute value of the difference is 5mA.

[0041] By comparing standby power consumption benchmarks based on specific scenarios, it is possible to accurately determine the power consumption differences of various electrical appliances under different power consumption scenarios, avoid misjudgments caused by scenario differences, and improve detection accuracy.

[0042] S4: When the absolute value of the difference between the real-time current value and the standby power consumption reference value exceeds the preset threshold, it is determined to be an abnormal short circuit of the wiring harness, the power supply circuit of the abnormal power distribution channel is cut off, and an alarm message is sent.

[0043] In step S4, the control module of the intelligent power distribution unit (IDU) compares the absolute value of the difference calculated in step S3 with a preset threshold. The preset threshold is set according to the power distribution channel type and the type of connected electrical appliances. For example, for a BMS channel, the preset threshold can be set to 20mA.

[0044] If the absolute value of the difference does not exceed the preset threshold, the current channel current is determined to be normal, and monitoring continues.

[0045] If the absolute value of the difference exceeds the preset threshold, it is preliminarily determined that there may be an anomaly.

[0046] Furthermore, to avoid misjudgment caused by instantaneous current fluctuations, a duration judgment condition can be added: only when the absolute value of the difference exceeds a preset threshold and the duration exceeds a preset duration (such as 3 seconds) will it be finally determined as a wire harness loose connection short circuit abnormality.

[0047] By setting reasonable preset thresholds and duration judgment conditions, abnormal current fluctuations caused by loose connections and short circuits in the wiring harness can be effectively identified, while filtering out false judgments caused by instantaneous current fluctuations, thus improving the reliability of detection.

[0048] In this embodiment, when the control module of the intelligent power distribution unit (IDU) determines that there is a short circuit in the wiring harness in a certain EFUSE channel, it immediately sends a shutdown control signal to the EFUSE element of that channel. After receiving the shutdown control signal, the EFUSE element cuts off the power supply circuit of that power distribution channel and stops supplying power to the connected electrical appliances.

[0049] Meanwhile, the control module of the Intelligent Power Distribution Unit (IDU) reports abnormal information to the Cockpit Domain Control Unit (CDCS) via the communication bus. The abnormal information includes the abnormal channel number, the abnormal type (short circuit in wiring harness), and the abnormal time.

[0050] Upon receiving an anomaly information, the cockpit domain control unit (CDCS) displays an alarm message on the instrument panel, such as "Power distribution system malfunction, please inspect," and can also provide audible or visual alerts. Seeing the alarm, the driver can promptly take the vehicle to a repair shop for troubleshooting and repair, preventing further use from escalating safety hazards.

[0051] By promptly cutting off the power supply circuit of abnormal power distribution channels, continuous sparking at the loose connections of the wiring harness can be prevented, thus preventing high temperatures from igniting surrounding combustibles and causing a vehicle fire. At the same time, the instrument alarm prompts the user to troubleshoot the fault, forming a complete safety protection closed loop and significantly improving the safety of the low-voltage power supply system of electric vehicles.

[0052] By monitoring the current values ​​of each EFUSE channel in real time under vehicle power-off conditions and comparing them with preset standby power consumption benchmarks, abnormal current fluctuations caused by wiring harness short circuits can be detected in a timely manner. Compared to the shortcomings of traditional fuse boxes, which cannot protect against short circuits before the fusing threshold is reached, this embodiment can identify and disconnect the circuit in the early stages of current anomalies, effectively preventing vehicle fires caused by continuous ignition. Furthermore, by combining power consumption scenario modes for comprehensive anomaly judgment, setting corresponding judgment strategies for power consumption characteristics under different scenarios, and adding duration judgment conditions to filter instantaneous current fluctuations, the accuracy and reliability of detection are significantly improved.

[0053] Example 2 This embodiment provides an intelligent power distribution system, such as Figure 2 As shown, it specifically includes the following components: A DC-DC high-voltage converter is used to convert a high-voltage battery (e.g., 800V) to a low-voltage 12V when the vehicle is powered on, so as to supply power to low-voltage electrical appliances.

[0054] In a vehicle power-down scenario, after the vehicle controller performs a power-down operation, the high-voltage to low-voltage converter receives a shutdown command. The control circuit stops driving the power switching devices, the high-frequency transformer stops working, and the output voltage gradually drops to 0V. At this point, the high-voltage to low-voltage converter no longer supplies power to the intelligent power distribution unit. In this state, the power supply of the intelligent power distribution unit relies entirely on the battery, thus entering the wiring harness short-circuit detection working mode described in this embodiment.

[0055] The battery serves as a backup power source, supplying power to low-voltage electrical appliances when the vehicle is powered off or the DC-DC converter is not in operation.

[0056] The intelligent power distribution unit (IDU) is the core component of this embodiment. It integrates a control module, a current detection module, a storage module, and multiple power distribution channels. Each power distribution channel is equipped with a current sensor to monitor the channel current value in real time.

[0057] The control module is the core control unit of the IDU, responsible for executing the overall control logic. The control module can be implemented using a 32-bit microcontroller (MCU) or a digital signal processor (DSP), with typical models including STMicroelectronics' STM32 series, NXP's S32K series, and Renesas' RH850 series, all automotive-grade microcontrollers. The main functions of the control module include: (1) Receive vehicle status information sent by the vehicle domain control unit (VIU) via the CAN bus, including power-on / off status and power usage scenario mode (normal power-on / off mode, remote power-on / off mode, OTA power-on mode, slow charging power-on mode, fast charging power-on mode, thermal runaway power-on mode, etc.). (2) Based on the vehicle status information, activate or deactivate the wiring harness short circuit detection strategy; (3) Control the current detection module to sample the current of each power distribution channel at a fixed period (e.g., 500ms); (4) Read the standby power consumption baseline data corresponding to the current power consumption scenario mode from the storage module; (5) Compare the sampled real-time current value with the standby power consumption reference value and execute the anomaly detection algorithm; (6) When it is determined that there is a wire harness short circuit abnormality in a certain channel, a shutdown control signal is sent to the EFUSE or HSD element of that channel; (7) Report abnormal information to the cockpit domain control unit (CDCS) via the CAN bus; (8) Record abnormal events in the historical fault record of the storage module.

[0058] The current detection module is a key component of the Intelligent Distribution Unit (IDU) for realizing visualized current monitoring. Its function is to detect the current value of each distribution channel in real time and convert the analog current signal into a digital signal for transmission to the control module for processing. The current detection module includes a current sensor and an analog-to-digital converter connected in series with each distribution channel.

[0059] The storage module is the data storage unit of the intelligent power distribution unit (IDU), used to store key data such as standby power consumption baseline data, power consumption scenario mode configuration parameters, preset threshold parameters, and historical fault records.

[0060] Each power distribution channel includes current sensors, electronic protection components (EFUSE or HSD), drive circuits, etc. Based on the power supply requirements and control methods of electrical appliances, power distribution channels are divided into two main categories: constant power supply channels and controlled power supply channels.

[0061] The constant power supply channel uses EFUSE (electronic fuse) components as electronic protection devices to provide 12V power to modules that require constant power supply, including the vehicle domain control unit, battery management unit, motor controller, slow charger, vehicle communication module, cockpit domain control unit, etc.

[0062] The controlled power supply channel uses HSD (High Side Driver) components as electronic switching devices to provide controlled 12V power to actuator-type electrical appliances, including electric door locks, window motors, wiper motors, horns, lights, etc.

[0063] The Battery Management Unit (BMS) is used to manage the charging and discharging of high-voltage batteries.

[0064] A motor controller (MCU) is used to control the drive motor.

[0065] The slow charger / high / low voltage converter (OBC) is used for power conversion during slow charging.

[0066] The vehicle domain control unit (VIU) is used for vehicle status management and control signal transmission. The main functions of the vehicle domain control unit (VIU) include: (1) Detect the power-on or power-off status of the vehicle. When the driver operates the key, remote control or in-vehicle button to perform the power-on or power-off operation, the VIU detects the relevant signals and determines whether the vehicle is currently in a power-on or power-off state. (2) Identify the current power consumption scenario mode. Based on the vehicle's working status and user operation, VIU identifies whether the current power-on / off mode is normal, remote power-on / off mode, OTA power-on mode, slow charging power-on mode, fast charging power-on mode, or thermal runaway power-on mode. (3) The VIU sends the vehicle status information to the IDU via the CAN bus. The VIU encapsulates the power-on / off status and power consumption scenario mode information into CAN messages and sends them to the IDU periodically (typically 100ms to 1000ms) or via event triggering via the CAN bus. (4) Receive the power distribution system status information reported by IDU, including the current value of each channel, fault information, etc., for vehicle status monitoring and fault diagnosis.

[0067] The Cockpit Domain Control Unit (CDCS) is used for cockpit function control and instrument display.

[0068] Other electrical appliances, including T-Box, IPB, RBU and other low-voltage electrical equipment.

[0069] In this embodiment, the high-voltage to low-voltage converter DC-DC and the battery are electrically connected in parallel to the power input terminal of the intelligent power distribution unit (IDU) to provide a 12V low-voltage power supply to the IDU.

[0070] The Intelligent Power Distribution Unit (IDU) distributes electrical energy to the Battery Management Unit (BMS), Motor Controller (MCU), Slow Charger / High / Low Voltage Converter (OBC), Vehicle Domain Controller Unit (VIU), Cockpit Domain Controller Unit (CDCS), and other electrical components through multiple power distribution channels formed by internal EFUSE electronic fuse elements and HSD high-side drive elements.

[0071] Modules requiring constant power supply (such as VIU, DCDC, OBC, MCU, IPB, RBU, T-Box, BMS, CDCS, etc.) are powered through the EFUSE electronic fuse channel, while actuator-type electrical appliances are powered through the HSD high-side drive channel.

[0072] The vehicle domain control unit (VIU) and the intelligent power distribution unit (IDU) communicate with each other via a vehicle communication bus (such as a CAN bus) to transmit vehicle status information.

[0073] The cockpit domain control unit (CDCS) communicates with the intelligent power distribution unit (IDU) via a communication bus. The CDS is used to receive abnormal information reported by the IDU and control the instrument display to display alarms.

[0074] The intelligent power distribution system provided in this embodiment provides the hardware foundation for realizing the detection of loose connections and short circuits in wiring harnesses. The following section will combine... Figure 1 This paper details a method for detecting loose connections and short circuits in a wiring harness implemented by an intelligent power distribution system. This method relies on the intelligent power distribution system provided in this embodiment. Specifically, the core of the method is that, in a vehicle power-off scenario, the IDU continuously monitors the real-time current value through current sensors built into each power distribution channel. The detected real-time current value is compared with a standby power consumption benchmark value pre-stored in the storage module. A comprehensive judgment is made based on the current power consumption scenario. When the difference between the detected real-time current value and the benchmark value exceeds a preset threshold, it is determined to be a loose connection and short circuit in the wiring harness. The power supply circuit of the abnormal power distribution channel is immediately cut off, and the abnormal information is reported to the cockpit domain control unit via the communication bus. An alarm is displayed on the instrument panel to prompt the user to troubleshoot the fault. Thus, the abnormality can be identified and protective actions executed before the current reaches the traditional fuse blowing threshold, realizing a proactive protection strategy combining hardware and software, effectively avoiding fire and vehicle damage accidents caused by loose connections and short circuits in the wiring harness.

[0075] like Figure 1As shown, the specific steps are as follows: S1: Obtain vehicle status information and identify vehicle power-off scenarios.

[0076] In step S1, after the vehicle main controller completes the power-down operation, the vehicle domain control unit (VIU) detects the vehicle power-down signal and sends the power-down status information to the intelligent power distribution unit (IDU) through the vehicle communication bus (such as the CAN bus).

[0077] After receiving the power-down status information, the control module of the Intelligent Power Distribution Unit (IDU) identifies that the current state is a vehicle power-down scenario. A vehicle power-down scenario refers to the state where the vehicle main controller completes the power-down operation and the high-side drive HSD channel stops outputting. At this time, the EFUSE constant power channel still maintains power supply to maintain the standby power consumption of some modules.

[0078] By transmitting the power-down status signal from the vehicle domain control unit (VIU), the intelligent power distribution unit (IDU) can accurately identify when the vehicle enters a power-down scenario, thereby activating a wiring harness short circuit detection strategy for that scenario. This avoids false detections during normal power-on operation and improves the targeting of the detection.

[0079] S2: In the scenario where the entire vehicle is powered off, obtain the real-time current value of each power distribution channel.

[0080] In step S2, each power distribution channel of the intelligent power distribution unit (IDU) is equipped with a current sensor. In this embodiment, the current sensor can be a Hall current sensor, a shunt resistor sampling circuit, or other types of current detection devices.

[0081] When the vehicle is powered off, the control module of the Intelligent Power Distribution Unit (IDU) activates its current detection function, focusing on monitoring the real-time current value of the EFUSE channel, which is constantly powered. Theoretically, the high-side drive HSD channel should have no current output when the vehicle is powered off; therefore, the EFUSE channel is the primary focus of monitoring.

[0082] By acquiring the current data of each EFUSE channel in real time through the built-in current sensors of each channel, an accurate data basis is provided for subsequent anomaly judgment. Compared with traditional fuse boxes that cannot acquire current data, this embodiment realizes the visualization monitoring of current.

[0083] S3: Compare the real-time current value with the preset standby power consumption reference value; In step S3, the storage module of the intelligent power distribution unit (IDU) pre-stores standby power consumption baseline data for each electrical component of the vehicle under different power consumption scenarios. In this embodiment, the power consumption scenarios include at least one of the following: normal power-on / off mode, remote power-on / off mode, OTA power-on mode, slow charging power-on mode, fast charging power-on mode, or thermal runaway power-on mode.

[0084] The control module of the Intelligent Power Distribution Unit (IDU) retrieves the standby power consumption reference value for each EFUSE channel under the corresponding scenario from a table in the storage module based on the current power consumption scenario mode information transmitted by the Vehicle Domain Controller (VIU). The control module compares the real-time current value of each channel detected in step S2 with the corresponding standby power consumption reference value and calculates the absolute value of the difference.

[0085] For example, if an EFUSE channel is connected to a battery management unit (BMS), under normal power-down conditions, the BMS's standby power consumption baseline is 50mA. If the detected real-time current value is 55mA, then the absolute value of the difference is 5mA.

[0086] By comparing standby power consumption benchmarks based on specific scenarios, it is possible to accurately determine the power consumption differences of various electrical appliances under different power consumption scenarios, avoid misjudgments caused by scenario differences, and improve detection accuracy.

[0087] S4: When the absolute value of the difference between the real-time current value and the standby power consumption reference value exceeds the preset threshold, it is determined to be an abnormal short circuit of the wiring harness, the power supply circuit of the abnormal power distribution channel is cut off, and an alarm message is sent.

[0088] In step S4, the control module of the intelligent power distribution unit (IDU) compares the absolute value of the difference calculated in step S3 with a preset threshold. The preset threshold is set according to the power distribution channel type and the type of connected electrical appliances. For example, for a BMS channel, the preset threshold can be set to 20mA.

[0089] If the absolute value of the difference does not exceed the preset threshold, the current channel current is determined to be normal, and monitoring continues.

[0090] If the absolute value of the difference exceeds the preset threshold, it is preliminarily determined that there may be an anomaly.

[0091] Furthermore, to avoid misjudgment caused by instantaneous current fluctuations, a duration judgment condition can be added: only when the absolute value of the difference exceeds a preset threshold and the duration exceeds a preset duration (such as 3 seconds) will it be finally determined as a wire harness loose connection short circuit abnormality.

[0092] By setting reasonable preset thresholds and duration judgment conditions, abnormal current fluctuations caused by loose connections and short circuits in the wiring harness can be effectively identified, while filtering out false judgments caused by instantaneous current fluctuations, thus improving the reliability of detection.

[0093] In this embodiment, when the control module of the intelligent power distribution unit (IDU) determines that there is a short circuit in the wiring harness in a certain EFUSE channel, it immediately sends a shutdown control signal to the EFUSE element of that channel. After receiving the shutdown control signal, the EFUSE element cuts off the power supply circuit of that power distribution channel and stops supplying power to the connected electrical appliances.

[0094] Meanwhile, the control module of the Intelligent Power Distribution Unit (IDU) reports abnormal information to the Cockpit Domain Control Unit (CDCS) via the communication bus. The abnormal information includes the abnormal channel number, the abnormal type (short circuit in wiring harness), and the abnormal time.

[0095] Upon receiving an anomaly information, the cockpit domain control unit (CDCS) displays an alarm message on the instrument panel, such as "Power distribution system malfunction, please inspect," and can also provide audible or visual alerts. Seeing the alarm, the driver can promptly take the vehicle to a repair shop for troubleshooting and repair, preventing further use from escalating safety hazards.

[0096] By promptly cutting off the power supply circuit of abnormal power distribution channels, continuous sparking at the loose connections of the wiring harness can be prevented, thus preventing high temperatures from igniting surrounding combustibles and causing a vehicle fire. At the same time, the instrument alarm prompts the user to troubleshoot the fault, forming a complete safety protection closed loop and significantly improving the safety of the low-voltage power supply system of electric vehicles.

[0097] By monitoring the current values ​​of each EFUSE channel in real time under vehicle power-off conditions and comparing them with preset standby power consumption benchmarks, abnormal current fluctuations caused by wiring harness short circuits can be detected in a timely manner. Compared to the shortcomings of traditional fuse boxes, which cannot protect against short circuits before the fusing threshold is reached, this embodiment can identify and disconnect the circuit in the early stages of current anomalies, effectively preventing vehicle fires caused by continuous ignition. Furthermore, by combining power consumption scenario modes for comprehensive anomaly judgment, setting corresponding judgment strategies for power consumption characteristics under different scenarios, and adding duration judgment conditions to filter instantaneous current fluctuations, the accuracy and reliability of detection are significantly improved.

[0098] Example 3 This embodiment provides a vehicle, including a memory and a processor, as well as computer instructions stored in the memory and running on the processor. When the processor executes the computer instructions, it performs the wiring harness short-circuit detection method described in Embodiment 1. Furthermore, the vehicle in this embodiment is equipped with the intelligent power distribution system provided in Embodiment 2.

[0099] First, the aforementioned intelligent power distribution system, such as Figure 2 As shown, it specifically includes the following components: A DC-DC high-voltage converter is used to convert a high-voltage battery (e.g., 800V) to a low-voltage 12V when the vehicle is powered on, so as to supply power to low-voltage electrical appliances.

[0100] In a vehicle power-down scenario, after the vehicle controller performs a power-down operation, the high-voltage to low-voltage converter receives a shutdown command. The control circuit stops driving the power switching devices, the high-frequency transformer stops working, and the output voltage gradually drops to 0V. At this point, the high-voltage to low-voltage converter no longer supplies power to the intelligent power distribution unit. In this state, the power supply of the intelligent power distribution unit relies entirely on the battery, thus entering the wiring harness short-circuit detection working mode described in this embodiment.

[0101] The battery serves as a backup power source, supplying power to low-voltage electrical appliances when the vehicle is powered off or the DC-DC converter is not in operation.

[0102] The intelligent power distribution unit (IDU) is the core component of this embodiment. It integrates a control module, a current detection module, a storage module, and multiple power distribution channels. Each power distribution channel is equipped with a current sensor to monitor the channel current value in real time.

[0103] The control module is the core control unit of the IDU, responsible for executing the overall control logic. The control module can be implemented using a 32-bit microcontroller (MCU) or a digital signal processor (DSP), with typical models including STMicroelectronics' STM32 series, NXP's S32K series, and Renesas' RH850 series, all automotive-grade microcontrollers. The main functions of the control module include: (1) Receive vehicle status information sent by the vehicle domain control unit (VIU) via the CAN bus, including power-on / off status and power usage scenario mode (normal power-on / off mode, remote power-on / off mode, OTA power-on mode, slow charging power-on mode, fast charging power-on mode, thermal runaway power-on mode, etc.). (2) Based on the vehicle status information, activate or deactivate the wiring harness short circuit detection strategy; (3) Control the current detection module to sample the current of each power distribution channel at a fixed period (e.g., 500ms); (4) Read the standby power consumption baseline data corresponding to the current power consumption scenario mode from the storage module; (5) Compare the sampled real-time current value with the standby power consumption reference value and execute the anomaly detection algorithm; (6) When it is determined that there is a wire harness short circuit abnormality in a certain channel, a shutdown control signal is sent to the EFUSE or HSD element of that channel; (7) Report abnormal information to the cockpit domain control unit (CDCS) via the CAN bus; (8) Record abnormal events in the historical fault record of the storage module.

[0104] The current detection module is a key component of the Intelligent Distribution Unit (IDU) for realizing visualized current monitoring. Its function is to detect the current value of each distribution channel in real time and convert the analog current signal into a digital signal for transmission to the control module for processing. The current detection module includes a current sensor and an analog-to-digital converter connected in series with each distribution channel.

[0105] The storage module is the data storage unit of the intelligent power distribution unit (IDU), used to store key data such as standby power consumption baseline data, power consumption scenario mode configuration parameters, preset threshold parameters, and historical fault records.

[0106] Each power distribution channel includes current sensors, electronic protection components (EFUSE or HSD), drive circuits, etc. Based on the power supply requirements and control methods of electrical appliances, power distribution channels are divided into two main categories: constant power supply channels and controlled power supply channels.

[0107] The constant power supply channel uses EFUSE (electronic fuse) components as electronic protection devices to provide 12V power to modules that require constant power supply, including the vehicle domain control unit, battery management unit, motor controller, slow charger, vehicle communication module, cockpit domain control unit, etc.

[0108] The controlled power supply channel uses HSD (High Side Driver) components as electronic switching devices to provide controlled 12V power to actuator-type electrical appliances, including electric door locks, window motors, wiper motors, horns, lights, etc.

[0109] The Battery Management Unit (BMS) is used to manage the charging and discharging of high-voltage batteries.

[0110] A motor controller (MCU) is used to control the drive motor.

[0111] The slow charger / high / low voltage converter (OBC) is used for power conversion during slow charging.

[0112] The vehicle domain control unit (VIU) is used for vehicle status management and control signal transmission. The main functions of the vehicle domain control unit (VIU) include: (1) Detect the power-on or power-off status of the vehicle. When the driver operates the key, remote control or in-vehicle button to perform the power-on or power-off operation, the VIU detects the relevant signals and determines whether the vehicle is currently in a power-on or power-off state. (2) Identify the current power consumption scenario mode. Based on the vehicle's working status and user operation, VIU identifies whether the current power-on / off mode is normal, remote power-on / off mode, OTA power-on mode, slow charging power-on mode, fast charging power-on mode, or thermal runaway power-on mode. (3) The VIU sends the vehicle status information to the IDU via the CAN bus. The VIU encapsulates the power-on / off status and power consumption scenario mode information into CAN messages and sends them to the IDU periodically (typically 100ms to 1000ms) or via event triggering via the CAN bus. (4) Receive the power distribution system status information reported by IDU, including the current value of each channel, fault information, etc., for vehicle status monitoring and fault diagnosis.

[0113] The Cockpit Domain Control Unit (CDCS) is used for cockpit function control and instrument display.

[0114] Other electrical appliances, including T-Box, IPB, RBU and other low-voltage electrical equipment.

[0115] In this embodiment, the high-voltage to low-voltage converter DC-DC and the battery are electrically connected in parallel to the power input terminal of the intelligent power distribution unit (IDU) to provide a 12V low-voltage power supply to the IDU.

[0116] The Intelligent Power Distribution Unit (IDU) distributes electrical energy to the Battery Management Unit (BMS), Motor Controller (MCU), Slow Charger / High / Low Voltage Converter (OBC), Vehicle Domain Controller Unit (VIU), Cockpit Domain Controller Unit (CDCS), and other electrical components through multiple power distribution channels formed by internal EFUSE electronic fuse elements and HSD high-side drive elements.

[0117] Modules requiring constant power supply (such as VIU, DCDC, OBC, MCU, IPB, RBU, T-Box, BMS, CDCS, etc.) are powered through the EFUSE electronic fuse channel, while actuator-type electrical appliances are powered through the HSD high-side drive channel.

[0118] The vehicle domain control unit (VIU) and the intelligent power distribution unit (IDU) communicate with each other via a vehicle communication bus (such as a CAN bus) to transmit vehicle status information.

[0119] The cockpit domain control unit (CDCS) communicates with the intelligent power distribution unit (IDU) via a communication bus. The CDS is used to receive abnormal information reported by the IDU and control the instrument display to display alarms.

[0120] Intelligent power distribution systems provide the hardware foundation for detecting loose connections and short circuits in wiring harnesses. The following section will discuss this in conjunction with... Figure 1This paper details a method for detecting loose connections and short circuits in a wiring harness implemented by an intelligent power distribution system. This method relies on the intelligent power distribution system provided in this embodiment. Specifically, the core of the method is that, in a vehicle power-off scenario, the IDU continuously monitors the real-time current value through current sensors built into each power distribution channel. The detected real-time current value is compared with a standby power consumption benchmark value pre-stored in the storage module. A comprehensive judgment is made based on the current power consumption scenario. When the difference between the detected real-time current value and the benchmark value exceeds a preset threshold, it is determined to be a loose connection and short circuit in the wiring harness. The power supply circuit of the abnormal power distribution channel is immediately cut off, and the abnormal information is reported to the cockpit domain control unit via the communication bus. An alarm is displayed on the instrument panel to prompt the user to troubleshoot the fault. Thus, the abnormality can be identified and protective actions executed before the current reaches the traditional fuse blowing threshold, realizing a proactive protection strategy combining hardware and software, effectively avoiding fire and vehicle damage accidents caused by loose connections and short circuits in the wiring harness.

[0121] like Figure 1 As shown, the specific steps are as follows: S1: Obtain vehicle status information and identify vehicle power-off scenarios.

[0122] In step S1, after the vehicle main controller completes the power-down operation, the vehicle domain control unit (VIU) detects the vehicle power-down signal and sends the power-down status information to the intelligent power distribution unit (IDU) through the vehicle communication bus (such as the CAN bus).

[0123] After receiving the power-down status information, the control module of the Intelligent Power Distribution Unit (IDU) identifies that the current state is a vehicle power-down scenario. A vehicle power-down scenario refers to the state where the vehicle main controller completes the power-down operation and the high-side drive HSD channel stops outputting. At this time, the EFUSE constant power channel still maintains power supply to maintain the standby power consumption of some modules.

[0124] By transmitting the power-down status signal from the vehicle domain control unit (VIU), the intelligent power distribution unit (IDU) can accurately identify when the vehicle enters a power-down scenario, thereby activating a wiring harness short circuit detection strategy for that scenario. This avoids false detections during normal power-on operation and improves the targeting of the detection.

[0125] S2: In the scenario where the entire vehicle is powered off, obtain the real-time current value of each power distribution channel.

[0126] In step S2, each power distribution channel of the intelligent power distribution unit (IDU) is equipped with a current sensor. In this embodiment, the current sensor can be a Hall current sensor, a shunt resistor sampling circuit, or other types of current detection devices.

[0127] When the vehicle is powered off, the control module of the Intelligent Power Distribution Unit (IDU) activates its current detection function, focusing on monitoring the real-time current value of the EFUSE channel, which is constantly powered. Theoretically, the high-side drive HSD channel should have no current output when the vehicle is powered off; therefore, the EFUSE channel is the primary focus of monitoring.

[0128] By acquiring the current data of each EFUSE channel in real time through the built-in current sensors of each channel, an accurate data basis is provided for subsequent anomaly judgment. Compared with traditional fuse boxes that cannot acquire current data, this embodiment realizes the visualization monitoring of current.

[0129] S3: Compare the real-time current value with the preset standby power consumption reference value; In step S3, the storage module of the intelligent power distribution unit (IDU) pre-stores standby power consumption baseline data for each electrical component of the vehicle under different power consumption scenarios. In this embodiment, the power consumption scenarios include at least one of the following: normal power-on / off mode, remote power-on / off mode, OTA power-on mode, slow charging power-on mode, fast charging power-on mode, or thermal runaway power-on mode.

[0130] The control module of the Intelligent Power Distribution Unit (IDU) retrieves the standby power consumption reference value for each EFUSE channel under the corresponding scenario from a table in the storage module based on the current power consumption scenario mode information transmitted by the Vehicle Domain Controller (VIU). The control module compares the real-time current value of each channel detected in step S2 with the corresponding standby power consumption reference value and calculates the absolute value of the difference.

[0131] For example, if an EFUSE channel is connected to a battery management unit (BMS), under normal power-down conditions, the BMS's standby power consumption baseline is 50mA. If the detected real-time current value is 55mA, then the absolute value of the difference is 5mA.

[0132] By comparing standby power consumption benchmarks based on specific scenarios, it is possible to accurately determine the power consumption differences of various electrical appliances under different power consumption scenarios, avoid misjudgments caused by scenario differences, and improve detection accuracy.

[0133] S4: When the absolute value of the difference between the real-time current value and the standby power consumption reference value exceeds the preset threshold, it is determined to be an abnormal short circuit of the wiring harness, the power supply circuit of the abnormal power distribution channel is cut off, and an alarm message is sent.

[0134] In step S4, the control module of the intelligent power distribution unit (IDU) compares the absolute value of the difference calculated in step S3 with a preset threshold. The preset threshold is set according to the power distribution channel type and the type of connected electrical appliances. For example, for a BMS channel, the preset threshold can be set to 20mA.

[0135] If the absolute value of the difference does not exceed the preset threshold, the current channel current is determined to be normal, and monitoring continues.

[0136] If the absolute value of the difference exceeds the preset threshold, it is preliminarily determined that there may be an anomaly.

[0137] Furthermore, to avoid misjudgment caused by instantaneous current fluctuations, a duration judgment condition can be added: only when the absolute value of the difference exceeds a preset threshold and the duration exceeds a preset duration (such as 3 seconds) will it be finally determined as a wire harness loose connection short circuit abnormality.

[0138] By setting reasonable preset thresholds and duration judgment conditions, abnormal current fluctuations caused by loose connections and short circuits in the wiring harness can be effectively identified, while filtering out false judgments caused by instantaneous current fluctuations, thus improving the reliability of detection.

[0139] In this embodiment, when the control module of the intelligent power distribution unit (IDU) determines that there is a short circuit in the wiring harness in a certain EFUSE channel, it immediately sends a shutdown control signal to the EFUSE element of that channel. After receiving the shutdown control signal, the EFUSE element cuts off the power supply circuit of that power distribution channel and stops supplying power to the connected electrical appliances.

[0140] Meanwhile, the control module of the Intelligent Power Distribution Unit (IDU) reports abnormal information to the Cockpit Domain Control Unit (CDCS) via the communication bus. The abnormal information includes the abnormal channel number, the abnormal type (short circuit in wiring harness), and the abnormal time.

[0141] Upon receiving an anomaly information, the cockpit domain control unit (CDCS) displays an alarm message on the instrument panel, such as "Power distribution system malfunction, please inspect," and can also provide audible or visual alerts. Seeing the alarm, the driver can promptly take the vehicle to a repair shop for troubleshooting and repair, preventing further use from escalating safety hazards.

[0142] By promptly cutting off the power supply circuit of abnormal power distribution channels, continuous sparking at the loose connections of the wiring harness can be prevented, thus preventing high temperatures from igniting surrounding combustibles and causing a vehicle fire. At the same time, the instrument alarm prompts the user to troubleshoot the fault, forming a complete safety protection closed loop and significantly improving the safety of the low-voltage power supply system of electric vehicles.

[0143] By monitoring the current values ​​of each EFUSE channel in real time under vehicle power-off conditions and comparing them with preset standby power consumption benchmarks, abnormal current fluctuations caused by wiring harness short circuits can be detected in a timely manner. Compared to the shortcomings of traditional fuse boxes, which cannot protect against short circuits before the fusing threshold is reached, this embodiment can identify and disconnect the circuit in the early stages of current anomalies, effectively preventing vehicle fires caused by continuous ignition. Furthermore, by combining power consumption scenario modes for comprehensive anomaly judgment, setting corresponding judgment strategies for power consumption characteristics under different scenarios, and adding duration judgment conditions to filter instantaneous current fluctuations, the accuracy and reliability of detection are significantly improved.

[0144] Example 4 This embodiment provides a computer-readable storage medium for storing computer instructions, which, when executed by a processor, complete the wire harness short-circuit detection method described in Embodiment 1.

[0145] Example 5 This embodiment provides a computer program product, which includes executable instructions stored in a computer-readable storage medium; wherein, when the vehicle's processor reads and executes the executable instructions from the computer-readable storage medium, it completes the wiring harness short-circuit detection method described in Embodiment 1.

[0146] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0147] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0148] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment, whereby a series of operational steps are performed to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0149] The steps and methods involved in Embodiments 2 to 5 above correspond to those in Embodiment 1. For detailed implementation methods, please refer to the relevant description section of Embodiment 1. The descriptions of each embodiment in the above embodiments have different emphases. Parts not described in detail in a certain embodiment can be referred to the relevant descriptions of other embodiments.

[0150] Those skilled in the art will understand that the modules or steps of the present invention described above can be implemented using general-purpose computer devices. Optionally, they can be implemented using computer-executable program code, thereby allowing them to be stored in a storage device for execution by a computer device, or they can be fabricated as separate integrated circuit modules, or multiple modules or steps can be fabricated as a single integrated circuit module. The present invention is not limited to any particular combination of hardware and software.

[0151] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for detecting loose connections and short circuits in wire harnesses, characterized in that, include: Acquire vehicle status information and identify vehicle power-off scenarios; In the scenario where the entire vehicle is powered off, obtain the real-time current value of each power distribution channel; The real-time current value is compared with a preset standby power consumption reference value; When the absolute value of the difference between the real-time current value and the standby power consumption reference value exceeds a preset threshold, it is determined to be an abnormal short circuit in the wiring harness, the power supply circuit of the abnormal power distribution channel is cut off, and an alarm message is sent.

2. The method for detecting loose connections and short circuits in a wire harness as described in claim 1, characterized in that, The real-time current value of each power distribution channel is obtained as the current value of the constant power supply channel, which is the EFUSE channel.

3. The method for detecting loose connections and short circuits in a wire harness as described in claim 1, characterized in that, The process of obtaining vehicle status information includes receiving a power-down status signal sent by the vehicle control unit and identifying the vehicle power-down scenario based on the power-down status signal.

4. The method for detecting loose connections and short circuits in a wire harness as described in claim 1, characterized in that, Before determining that the wiring harness is loosely connected or short-circuited, the process also includes anomaly detection based on the power consumption characteristics corresponding to the current power consumption scenario.

5. The method for detecting loose connections and short circuits in a wire harness as described in claim 4, characterized in that, The power consumption scenario modes include at least one of the following: normal power-on / off mode, remote power-on / off mode, OTA power-on mode, slow charging power-on mode, fast charging power-on mode, or thermal runaway power-on mode.

6. An intelligent power distribution system, based on the wire harness short-circuit detection method according to any one of claims 1-5, characterized in that, Including the following: High-voltage to low-voltage converter, battery, intelligent power distribution unit, vehicle domain control unit, and cockpit domain control unit; The high-voltage to low-voltage converter is used to convert high-voltage electricity into low-voltage electricity; the battery is connected in parallel with the high-voltage to low-voltage converter and then electrically connected to the intelligent power distribution unit; the intelligent power distribution unit includes a control module, a current detection module and multiple power distribution channels, each power distribution channel is equipped with a current sensor, the control module is electrically connected to the current detection module, and the intelligent power distribution unit is communicatively connected to the vehicle domain control unit and the cockpit domain control unit respectively.

7. The intelligent power distribution system as described in claim 6, characterized in that, The current sensor is used to obtain the real-time current value of each power distribution channel.

8. A vehicle, characterized in that, The method includes a memory and a processor, as well as computer instructions stored in the memory and running on the processor, which, when executed by the processor, perform the wire harness short-circuit detection method according to any one of claims 1-5.

9. A computer-readable storage medium, characterized in that, Used to store computer instructions, which, when executed by a processor, complete the wire harness short circuit detection method according to any one of claims 1-5.

10. A computer program product comprising executable instructions stored in a computer-readable storage medium; wherein, When the vehicle's processor reads executable instructions from a computer-readable storage medium and executes the executable instructions, it completes the wiring harness short-circuit detection method according to any one of claims 1-5.

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